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Table 3 238U, 232Th and 235U decay series radionuclides in the Bruchsal brine samples

From: Water–rock interactions in the Bruchsal geothermal system by U–Th series radionuclides

Decay series Radionuclide Specific activity (Bq kg−1) Relative uncertainty (%) Number of samples Method
Uranium series 238U 0.012 59 1 α-spectrometry
234U 0.01 66 1 α-spectrometry
230Th < 0.08   1 α-spectrometry
226Ra 29.0 8.3 13 γ-spectrometry
222Rn 37.8 7.4 1 γ-spectrometry
210Pb 25.8 26 12 γ-spectrometry
210Po < 0.1   1 α-spectrometry
Actinium series 235U < 0.004   1 α-spectrometry
227Ac < 0.1   1 α-spectrometry
223Ra 0.47 60 13 γ- spectrometry
Thorium series 232Th < 0.01   1 α-spectrometry
228Ra 15.9 5.8 13 γ-spectrometry
228Ac 6.1 27 2 γ-spectrometry
228Th < 0.02   1 α-spectrometry
224Ra 10.3 7.5 13 γ-spectrometry
212Pb 15.7 6.4 2 γ-spectrometry
  1. Relative uncertainties are quoted in percentage (± 2σ from counting statistics)